Questions tagged [limit]
Limiting the usage of a resource (memory, disk space, CPU time, open files, network bandwidth, …) by a process or a group of processes.
248
questions
0
votes
0
answers
16
views
Why my app cannot write to a file after a certain size?
Recently, I was running a spike risc-v simulation app on linux and noticed that log output stops after 513MBs, even though expected to have larger sizes. I checked ulimit with -f and other options, ...
0
votes
1
answer
121
views
How to limit the concurrent GUI login, but allow multiple SSH login?
On an Ubuntu desktop, contains several accounts, I want to limit the GUI login number.
At anytime, there should be only one account can login by using local GUI. (The first account must logout before ...
- 1
0
votes
0
answers
91
views
grep: What is the limit for a pattern file size
I am using grep with the -f option and I run into an issue when the pattern file given with -f is very long. The one that is failing for me has almost 300 thousand lines and 40 MBytes. grep does not ...
- 222
2
votes
1
answer
108
views
How limit CPU/Ram on a system service on nixos?
My metabase service is eating all the resources on my machine, and while found a solution I need a way to limit the usage the resources.
How can I configure it on nixos?
❯ nixos-version
22.05.2123....
- 121
0
votes
1
answer
508
views
How to determine "number of concurrent sessions" for all users on a server
I am trying to determine the total number of concurrent sessions on a server to determine a good number for the maxlogins option in /etc/security/limits.conf. How is the number of sessions calculated ...
- 1,057
1
vote
0
answers
203
views
systemd/cgroup resource limits -- different behaviour between hosts
I'm heavily confused. I have a physical server running Ubuntu 20.04 and a vagrant (VirtualBox) virtual machine also running Ubuntu 20.04. Both are running with hwe 5.13 kernel and systemd 245 (245.4-...
- 1,261
0
votes
0
answers
29
views
Transparently Rate Limiting ANY Connection that is Already In-Progress
Let's say I begin a large download, and (about an hour into it) I find that it is consuming too much of my overall bandwidth.
Is there any way to rate limit that particular connection "after the ...
- 4,693
1
vote
0
answers
236
views
systemd resource control -- all users/root
I'm using Debian Bullseye with systemd 247. I have more than a hundred of users and I would like to enforce some limits using cgroups. I use set-property, which works as expected, for example for the ...
- 1,261
3
votes
0
answers
214
views
Linux: Is there a limit for the number of fork() calls one process goup can issue? (Not per user!)
We have a strange problem on a SuSE Linux Enterprise Server 12.5 system (kernel 4.12.14-122.60), which is the only KVM guest in a simliar KVM host:
One service started by systemd starts one program -&...
2
votes
0
answers
704
views
How can I limit bandwidth per connection using tc?
I am pretty new to Linux and tc command and lately I have been looking for a solution to limit bandwidth per connection using the tc command. I have a server application that handles requests from ...
- 21
0
votes
2
answers
966
views
Values from sysctl -A don't match /etc/sysctl.conf even after restart
I'm on Mac Monterey 12.1 and increased my shared memory limits in /etc/sysctl.conf file:
kern.sysv.shmmax: 16777216
kern.sysv.shmmin: 1
kern.sysv.shmmni: 128
kern.sysv.shmseg: 512
kern.sysv.shmall: ...
- 955
0
votes
0
answers
440
views
Can't set fs.nr_open limit via sysctl
I'm trying to set fs.nr_open via sysctl (for learning purpose) to different value, other than default 1048576
These are sysctl settings after system was booted:
vud@ubuntu:~$ sudo sysctl -a | grep -E '...
- 1
0
votes
1
answer
350
views
Create limitations systemd service file
I wanted to set some limits for my systemd service, such as:
Network bandwidth
Cpu quote
If the limit is over, then systemd service should stop.
Thank you in advance
- 1
1
vote
0
answers
81
views
How do I make a Linux process believe it is using 100% of CPU while limiting it with a cgroup?
Cgroups allow artificially limiting CPU time available to a process using cpu.cfs_quota_us and cpu.cfs_period_us parameters.
This however results in a discrepancy when the program monitors its CPU ...
- 5,378
0
votes
0
answers
54
views
OpenBSD 6.9 - ENOMEM error on execve (execvp)
I've compiled a program on OpenBSD 6.9 and when I execute the program, I get an enomem error related specifically to execvp which the man pages say is a font-end for execve.
The execve man page ...
- 41
0
votes
1
answer
281
views
How to get the correct device to limit block IO for docker container?
(I posted this question at stackoverflow, but maybe here is the more appropriate place, if necessary - I'll delete the other question.)
I need to put a limit on block IO operations speed for a number ...
- 125
1
vote
0
answers
329
views
How to best hard-limit my Firefox' memory hogging?
I use Firefox 83 on my Devuan GNU/Linux Beowulf desktop.
Unfortunately, for reasons which are not clear to me, FF has memory issues which cause it to gradually take up more and more of my system's ...
- 8,143
0
votes
2
answers
284
views
LVM 4,55 TiB Volume Group. I only can create a 2.70TiB logical volume
I create a Volume Group with 3 disks, 2 of 931g, and 1 of 2.73t. It seems like works propertly.
sudo pvs
PV VG Fmt Attr PSize PFree
/dev/sdb nxt lvm2 a-- 931.51g 931.51g
/dev/...
0
votes
1
answer
193
views
Is there a file system out there that supports custom file size limit?
I'm aware that EXT4 has a max_dir_size_kb mount option to set up the max size of each directory. It doesn't have a similar option to specify the max size of individual files, though.
Is somebody aware ...
- 1,279
2
votes
2
answers
1k
views
Where does the systemctl Tasks (limit=) come from and can I temporarily change it?
I am having trouble with Tomcat 9, openjdk 11.0.9.1 on ubuntu 18.04. I installed it using these instructions: https://linuxize.com/post/how-to-install-tomcat-9-on-ubuntu-18-04/
It worked fine for a ...
- 41
1
vote
1
answer
653
views
limits.conf not working for SSH connections on Fedora 33
I am trying to set a limit on a group called rlimited. I have the following in my /etc/security/limits.conf
@rlimited hard cpu 5
The same file exists in the /etc/security/limits.d/ folder.
I've also ...
- 19
0
votes
1
answer
5k
views
rhel 7 setting stack size to unlimited
I have some old code that needs the stack to not be limited to 8192kb in order for it to run.
I am used to doing this in /etc/security/limits.conf
* stack hard unlimited
* stack soft ...
- 5,195
0
votes
1
answer
955
views
Limit bandwidth for outgoing/incoming with latency for specific port using TC
I'm trying to limit the incoming and outgoing bandwidth with latency through a specific port using TC but I can't get it to work 100%. I'm not sure if I've done it correctly.
When I ping google, the ...
0
votes
0
answers
192
views
Linux Directory Size Limiting
I have a FTP server with anonymous access for my local network. Here I have directories named with department names. I want to limit the directory sizes in respect to departments.
/var/ftp/pub/
...
- 31
3
votes
2
answers
156
views
Stop specific processes from heating up my system's CPU
I have a process doing some computation the whole time. It causes my system's CPU to heat up and the fan to spin faster.
I want this process to run, but with a low priority. I don't want my system to ...
- 3,588
1
vote
1
answer
4k
views
"Too Many Open Files" for Apache and java/tomcat. How to set per-process limits?
This problem has now appeared twice on my production Ubuntu machine running both a node server (tiny) and a Spring Boot Java server (the workhorse). The first time it happened, grinding my server to a ...
- 143
4
votes
1
answer
921
views
Is there a limit for the read command?
I'm trying to write a bash script that will let me save a backup code (lots of numbers) in a file. I've finished the script but it's only letting me to save 4096 digits of the code.
I tried to do this:...
- 611
4
votes
1
answer
948
views
How can I limit both pty and non-pty ssh sessions to 'maxlogins'?
I have a normal Linux user that is:
only allowed to login via ssh to execute a single command and nothing else
may never login more the once at a single time
The first restriction is implemented ...
- 793
1
vote
1
answer
1k
views
How can I limit the CPU usage (% of CPU)?
It happened to me multiple times now that a program which entered an infinite loop made the entire machine completely unresponsive, one time even foreign JavaScript, and I had to power off. This is ...
user361749
2
votes
1
answer
1k
views
AMDGPU driver vramlimit
I have a console installation of debian and i found that from the available 16GB of ram i can see only 14GB, this is because my APU (AMD) is reserving 2GB which is way too much for my needs. The bad ...
- 21
3
votes
1
answer
81
views
Linux not enforcing limits correctly?
As an experiment on a test system, I tried to limit my own number of processes using /etc/security/limits.conf. When logged on the system I had 16 processes to my name running (all had ruid, euid and ...
1
vote
1
answer
2k
views
Limits of tmpfs filesystem
What are the limits of the tmpfs filesystem in terms of:
Maximum file size
Maximum file system size
Maximum subdirectories
Maximum symlink depth
I'm using a centOS 8. The tmpfs is mounted via:
[...
- 11
1
vote
1
answer
1k
views
Not able to increase ulimit -Hn, only shows up for a sudo su session
So I am trying to change my hard limit for file descriptors on Ubuntu18.04 laptop. I have tried everything but the changes have still not taken effect.
I need to run a go program which keeps throwing ...
- 125
0
votes
1
answer
82
views
Unable to login to a user(oracle) "error: resource temporary unavailable"
When I try to login to oracle via ssh or su - oracle it shows following error
**error:resource temporary unavailable**
CPU Memory & IOps utilization is normal
- 99
0
votes
0
answers
43
views
How can df report different information depending in it's target path?
Example:
root@myinstance:/my/instance/path# df -h
Filesystem Size Used Avail Use% Mounted on
...
/dev/mapper/hdd-place 13T 899G 12T 8% /run/iss
...
root@myinstance:/my/instance/...
- 2,877
0
votes
2
answers
413
views
"Xorg" process does not take limits from /etc/security/limits.conf
I have this in my /etc/security/limits.conf:
#<domain> <type> <item> <value>
root - memlock 65536
root - stack 524288
root ...
- 333
0
votes
0
answers
256
views
limits.conf nproc not being applied
this is our limits.conf
* soft nofile 999999
* hard nofile 999999
* soft noproc 256000
* hard noproc 256000
and then we check for the changes after a reboot, ...
3
votes
1
answer
661
views
How to "soft-limit" CPU usage of a process
I have some processes running on Debian that I want to limit cpu of it usage in the "soft" manner. For example, if it eats more than 70% of a single core for more than 15 minutes, the CPU ...
2
votes
1
answer
745
views
limits.conf is not working
I'm trying to set default niceness/priority for a user's processes on Ubuntu 18.04.3 LTS in limits.conf and everything I write in limits.conf is simply ignored. Hard nice, soft nice, hard priority, ...
- 123
4
votes
0
answers
769
views
Processes started through SSH add up to limit of SSH Daemon (systemd)
on a productive server there are (background) processes started by users which connect through SSH and run some scripts. These processes are daemons and keep on running. Each started process is found ...
- 281
3
votes
1
answer
83
views
Is it possible to impose a minimum niceness on a specific user?
Is it possible to limit a specific user's processes to always run with a niceness of at least 15, say?
- 14.2k
2
votes
1
answer
7k
views
Limit bandwidth on a specific port in CentOS 7?
I am running CentOS 7 on my VPS and I would like to limit bandwidth on a specific port. I have looked around extensively, and out of the solutions I can find, either it's a limit placed on an ...
- 575
0
votes
0
answers
675
views
Restricted shell within docker container
Some context for my question: I am working on a pty NodeJS server running in docker where I want to provide users connecting to the shell an isolated environment where they can play around with ...
- 101
1
vote
0
answers
335
views
Limit container resources both using --memory and --cgroup-parent
I'd like to limit both total memory consumption for a group of containers as well as memory consumption for a particular container.
Say, a container is allowed to consume not greater than 1Gb and all ...
- 21
0
votes
1
answer
52
views
Setting soft limit above hard does not fail in terms of exit code?
root@Andromeda:/# ulimit -n -S
2048
root@Andromeda:/# ulimit -n -H
2048
root@Andromeda:/# ulimit -n -S 4096
2048
root@Andromeda:/# echo $?
0
Failure to set soft limit above the hard one makes sense.
...
- 2,433
5
votes
1
answer
453
views
dash maximum variable length under systemd
I have a shell script that uses a single variable as an associative array (one KEY=VALUE per line).
Throughout the execution of the script, the variable is manipulated to add, remove or modify ...
- 418
1
vote
1
answer
295
views
Change max line length of GNU parallel
The following command:
parallel --max-line-length-allowed
returns 131049.
Is this a constant, or can I somehow change this limit?
- 133
1
vote
1
answer
994
views
Limit on continuously writing to a log file
I am using Debian running on a BeableBone Black with 4GB of internal flash storage.
My program is continuously writing / appending to a log file that I created with >> every minute, all day ...
- 1,071
0
votes
1
answer
2k
views
Open file limits not increased for redis user despite change in /etc/security/limits.conf
I got
ERR max number of clients reached
from my redis server so I decidied to increase the allowed max client connections in its configuration. This also requires according to the documentation, ...
- 2,433
1
vote
1
answer
3k
views
Download error with youtube-dl and axel
I am trying to download following video:
https://www.youtube.com/watch?v=pQWj2Fgxdrc
by combining 'youtube-dl' and 'axel'. I am trying to download this video in such a way that I want these two ...
- 21